Sail powered windmill



FIG. 1 is a front perspective view of a sail powered windmill showing mynew design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view of a sail powered windmill showing asecond embodiment of my new design, it being understood that the soledifference resides in the use of just four blades;

FIG. 6 is a right side elevational view of the embodiment of FIG. 5;

FIG. 7 is a front elevational view of a sail powered windmill showing athird embodiment of my new design, it being understood that the soledifference resides in the use of just three blades; and

FIG. 8 is a right side elevational view of the embodiment of FIG. 7.

The ornamental design for a sail powered windmill, as shown anddescribed.